# AC Circuits

10 Questions | Total Attempts: 334

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Finding the the correct word being describe in the statement.

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• 1.
What is the word being describe here?" the number of times the waveform repeats itself within a one second time period".
• A.

Period

• B.

Amplitude

• C.

Frequency

• 2.
is the magnitude or intensity of the signal waveform measured in volts or amps.
• A.

Period

• B.

Amplitude

• C.

Frequency

• 3.
is the length of time in seconds that the waveform takes to repeat itself from start to finish.
• A.

Period

• B.

Amplitude

• C.

Frequency

• 4.
•Vectors, Phasors and Phasor Diagrams only apply to sinusoidal AC waveforms.
• A.

True

• B.

False

• 5.
•All phasors are drawn rotating in an anticlockwise direction. All the phasors ahead of the reference phasor are said to be ___________ while all the phasors behind the reference phasor are said to be ___________.
• 6.
A coil has a resistance of 30Ω and an inductance of 0.5H. If the current flowing through the coil is 4amps and its frequency is 50Hz. What will be the inductive reactance?
• A.

357Ohms

• B.

257Ohms

• C.

157Ohms

• 7.
A coil has a resistance of 30Ω and an inductance of 0.5H. If the current flowing through the coil is 4amps and its frequency is 50Hz. What will be the impedance?
• A.

159.8Ohms

• B.

259.8Ohms

• C.

359.8Ohms

• 8.
A coil has a resistance of 30Ω and an inductance of 0.5H. If the current flowing through the coil is 4amps and its frequency is 50Hz. What will be the voltage drop across resistor?
• A.

140 V

• B.

130 V

• C.

120 V

• 9.
A coil has a resistance of 30Ω and an inductance of 0.5H. If the current flowing through the coil is 4amps and its frequency is 50Hz. What will be the voltage drop across inductor?
• A.

628 V

• B.

528 V

• C.

428 V

• 10.
A coil has a resistance of 30Ω and an inductance of 0.5H. If the current flowing through the coil is 4amps and its frequency is 50Hz. What will be the supply voltage?
• A.

620 V

• B.

630 V

• C.

640 V